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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifdef __GNUC__
#pragma implementation // gcc: Class implementation
#endif
#include "mysql_priv.h"
#include <m_ctype.h>
#ifndef MASTER
#include "../srclib/merge/mrgdef.h"
#else
#include "../merge/mrgdef.h"
#endif
#include "ha_isammrg.h"
/*****************************************************************************
** ISAM MERGE tables
*****************************************************************************/
const char **ha_isammrg::bas_ext() const
{ static const char *ext[]= { ".MRG", NullS }; return ext; }
int ha_isammrg::open(const char *name, int mode, int test_if_locked)
{
char name_buff[FN_REFLEN];
if (!(file=mrg_open(fn_format(name_buff,name,"","",2 | 4), mode,
test_if_locked)))
return (my_errno ? my_errno : -1);
if (!(test_if_locked == HA_OPEN_WAIT_IF_LOCKED ||
test_if_locked == HA_OPEN_ABORT_IF_LOCKED))
mrg_extra(file,HA_EXTRA_NO_WAIT_LOCK);
info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);
if (!(test_if_locked & HA_OPEN_WAIT_IF_LOCKED))
mrg_extra(file,HA_EXTRA_WAIT_LOCK);
if (table->reclength != mean_rec_length)
{
DBUG_PRINT("error",("reclength: %d mean_rec_length: %d",
table->reclength, mean_rec_length));
mrg_close(file);
file=0;
return ER_WRONG_MRG_TABLE;
}
return (0);
}
int ha_isammrg::close(void)
{
return !mrg_close(file) ? 0 : my_errno ? my_errno : -1;
}
uint ha_isammrg::min_record_length(uint options) const
{
return (options & HA_OPTION_PACK_RECORD) ? 1 : 5;
}
int ha_isammrg::write_row(byte * buf)
{
return (my_errno=HA_ERR_WRONG_COMMAND);
}
int ha_isammrg::update_row(const byte * old_data, byte * new_data)
{
statistic_increment(ha_update_count,&LOCK_status);
if (table->time_stamp)
update_timestamp(new_data+table->time_stamp-1);
return !mrg_update(file,old_data,new_data) ? 0 : my_errno ? my_errno : -1;
}
int ha_isammrg::delete_row(const byte * buf)
{
statistic_increment(ha_delete_count,&LOCK_status);
return !mrg_delete(file,buf) ? 0 : my_errno ? my_errno : -1;
}
int ha_isammrg::index_read(byte * buf, const byte * key,
uint key_len, enum ha_rkey_function find_flag)
{
return (my_errno=HA_ERR_WRONG_COMMAND);
}
int ha_isammrg::index_read_idx(byte * buf, uint index, const byte * key,
uint key_len, enum ha_rkey_function find_flag)
{
return (my_errno=HA_ERR_WRONG_COMMAND);
}
int ha_isammrg::index_next(byte * buf)
{
return (my_errno=HA_ERR_WRONG_COMMAND);
}
int ha_isammrg::index_prev(byte * buf)
{
return (my_errno=HA_ERR_WRONG_COMMAND);
}
int ha_isammrg::index_first(byte * buf)
{
return (my_errno=HA_ERR_WRONG_COMMAND);
}
int ha_isammrg::index_last(byte * buf)
{
return (my_errno=HA_ERR_WRONG_COMMAND);
}
int ha_isammrg::rnd_init(bool scan)
{
return !mrg_extra(file,HA_EXTRA_RESET) ? 0 : my_errno ? my_errno : -1;
}
int ha_isammrg::rnd_next(byte *buf)
{
statistic_increment(ha_read_rnd_next_count,&LOCK_status);
int error=mrg_rrnd(file, buf, ~(mrg_off_t) 0);
table->status=error ? STATUS_NOT_FOUND: 0;
return !error ? 0 : my_errno ? my_errno : -1;
}
int ha_isammrg::rnd_pos(byte * buf, byte *pos)
{
statistic_increment(ha_read_rnd_count,&LOCK_status);
int error=mrg_rrnd(file, buf, (ulong) ha_get_ptr(pos,ref_length));
table->status=error ? STATUS_NOT_FOUND: 0;
return !error ? 0 : my_errno ? my_errno : -1;
}
void ha_isammrg::position(const byte *record)
{
ulong position= mrg_position(file);
ha_store_ptr(ref, ref_length, (my_off_t) position);
}
void ha_isammrg::info(uint flag)
{
MERGE_INFO info;
(void) mrg_info(file,&info,flag);
records = (ha_rows) info.records;
deleted = (ha_rows) info.deleted;
data_file_length=info.data_file_length;
errkey = info.errkey;
table->keys_in_use=0; // No keys yet
table->db_options_in_use = info.options;
mean_rec_length=info.reclength;
block_size=0;
update_time=0;
ref_length=4; // Should be big enough
}
int ha_isammrg::extra(enum ha_extra_function operation)
{
return !mrg_extra(file,operation) ? 0 : my_errno ? my_errno : -1;
}
int ha_isammrg::reset(void)
{
return !mrg_extra(file,HA_EXTRA_RESET) ? 0 : my_errno ? my_errno : -1;
}
int ha_isammrg::external_lock(THD *thd, int lock_type)
{
return !mrg_lock_database(file,lock_type) ? 0 : my_errno ? my_errno : -1;
}
uint ha_isammrg::lock_count(void) const
{
return file->tables;
}
THR_LOCK_DATA **ha_isammrg::store_lock(THD *thd,
THR_LOCK_DATA **to,
enum thr_lock_type lock_type)
{
MRG_TABLE *table;
for (table=file->open_tables ; table != file->end_table ; table++)
{
*(to++)= &table->table->lock;
if (lock_type != TL_IGNORE && table->table->lock.type == TL_UNLOCK)
table->table->lock.type=lock_type;
}
return to;
}
int ha_isammrg::create(const char *name, register TABLE *form,
HA_CREATE_INFO *create_info)
{
char buff[FN_REFLEN];
return mrg_create(fn_format(buff,name,"","",2+4+16),0);
}
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